NDLI: Partition of Platinum-Group Elements between arsenide and sulfide minerals in magmatic NiCu sulfide systems

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Partition of Platinum-Group Elements between arsenide and sulfide minerals in magmatic NiCu sulfide systems

Content Provider	Semantic Scholar
Author	Piña, Rubén Gervilla, Fernando Barnes, Sj Michael Ortega, Leonardo Lunar, Rosario
Copyright Year	2012
Abstract	The partition coefficients of platinum-group elements (PGE) between arsenide and sulfide minerals (DPGE) have been calculated by determining in situ concentrations of these elements by LA-ICP-MS in coexisting arsenide (maucherite) and sulfide (pyrrhotite, pentlandite and chalcopyrite) minerals from the Beni Bousera Cr-Ni mineralization (North Morocco). Maucherite contains significant amounts of all PGE (average values, 8.3 ppm Os, 25.8 ppm Ir, 7.5 ppm Ru, 8.6 ppm Rh, 61.7 ppm Pd and 7.5 ppm Pt), whereas sulfides have contents commonly below 0.2 ppm. With the exception of Pt, mass balance calculation indicates that arsenides and sulfides account for the bulk of PGE in the samples. The calculated DPGE reveal the strong affinity of PGE by arsenide minerals: DIr = 923, DRh = 540, DPt = 325, DPd = 254, DOs = 145 and DRu = 50. The maucherite grains, which occur included within the sulfides (mostly pyrrhotite), can attribute to: 1) direct crystallization from sulfide melt before mss crystallization, or 2) crystallization from an arsenide melt segregated by immiscibility from a sulfide melt. Because of maucherite melts incongruently above 830oC, well below the temperature of crystallization of mss (around 1000oC), maucherite probably represents the crystallization product of droplets of arsenide melt and the calculated partition coefficients, the partition values of PGE between arsenide and sulfide melts.
File Format	PDF HTM / HTML
Alternate Webpage(s)	https://www.ucm.es/data/cont/media/www/pag-43762/Pi%C3%B1a%20et%20al%202012%20-%20Abstract%20Nickel%20Guiyang.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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